Baofeng Dm1702 Firmware Update

⚠️ Critical Warning: A failed firmware update can brick your radio. Ensure your computer does not go to sleep, the USB cable does not disconnect, and the battery is fully charged before starting.

Issue 2: Flashing Stops at 50% (Verification Failed)

• Cause: Poor USB cable or voltage drop.
• Fix: Use a thicker, shorter programming cable. Disable USB selective suspend in Windows Power Options. Try a different USB port.

• Fix: This is almost always a cable or power issue. Use an FTDI cable. Ensure your radio battery is >80% charged. Turn off all other programs (especially Bluetooth and WiFi adapters that use COM ports).

Software Checklist

• DM-1702 Firmware Flasher Tool (Usually DMR_Flash_Tool.exe or the OpenGD77 installer).
• The Firmware File (Either the official Baofeng .bin file from Baofeng's tech support or the latest OpenGD17_1702.sgl file from the OpenGD77 website).
• Drivers: You need the correct USB drivers for the radio's bootloader. The STM32 bootloader drivers are required. The easiest way is to install Zadig driver utility.

Use Correct Software: Use the Retevis RT72 CPS or the specific "MD" programming software often packaged with the firmware files. baofeng dm1702 firmware update